Struggling connecting Omega2+ to wifi

Hello everyone!
Today I tried to connect my Omega2+ to my home Wifi (for some experiments). But i can't manage to get it working!
Trough the GUI, when I check the "Enable wifi" box and refresh the page, the box is still unchecked... So I tried to manage it with the CLI, but it don't work too (With Wifimanager or Wifisetup).
Here is my uci show wireless:

I read on this post that some French resident (like me) have this problem too, but the post didn't get any answers. But I changed the wireless.ra0.country= to 'FR', as recommended on the post.
I checked dmesg, and here again nothing looks weird...